Designing a 3 way active crossover setup.

[Boscoe]

I have nothing in the way of amplifiers as I am just starting in amplifiers really although I have built several pairs of speakers.

I'm thinking of making three separate amplifiers and using a adjustable active crossover then I would also make a pre amp too.

My problem is not the amplifiers as I have already received some help on those in a separate thread it would be the active crossover as I want it adjustable so I can use it on different speakers If I need to. Is this do able on a realistic budget? I have a book with several crossover designs but I don't know how I would make them adjustable as they use 3 capacitors to adjust the crossover point other than that it seems quite easy!

Thanks
Boscoe

[AndrewT]

read MOX and it's derivatives.

[abraxalito]

Making fully adjustable crossovers is best done in digital filters, not analogue. I don't think its realistic to make an adjustable XO which will suit a wide variety of speakers in analogue mode. I'm planning something like this myself and I've settled on modules where the component values can be pre-set to suit. Making them variable or even switchable over a wide range is rather impractical.

If you would like to press ahead, its easier to vary resistors than caps.

Andrew - excuse my ignorance here, but what's MOX?

[AndrewT]

MOX, in this Forum, is a series of design threads that discussed in detail what a crossover should be able to do, how to design an adjustable crossover and spawned a few Group Buys for various versions of the MOX type PCBs.

This thread discussed a plug in discrete opamp for the MOX and any other circuit that could benefit from a discrete plug in opamp.
MOX-like crossover and discrete opamp group buy